2 weeks with a sheet of plastic taped over where the window *should* go

Some guys came by the house recently to replace the old crappy garden window in bathroom.

Here’s an artsy picture of the window:

I was working from home in order to give the contractor access to the house and was in the other room. I did not hear any power tools for the first 40 minutes or so.

This was unnerving at first, then VERY reassuring. Why?

It was unnerving because they’d already come out a few weeks ago to do measurements to order the right window, and in my mind this meant that when they arrived today with the window they’d hit the ground running.

But instead, they did MORE measuring, more careful checking, more thinking, more stuff that reduced the very real risk (anyone who has paid for a construction project of any size knows this) of my wife and I spending 2 weeks with a sheet of plastic taped over where the window should go because the window was off by 1/2” or whatever and they had to re-order and come back later to install.

What about you? What do you do to reassure your clients that the time and effort spent on up-front planing work is well-invested?